From fdab1544fb0dc1af245d36927fe4ab830b0ef2c0 Mon Sep 17 00:00:00 2001
From: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Date: Wed, 8 Mar 2023 12:27:49 +0200
Subject: [PATCH] Add a (temporary) way to attach popups to layer surfaces

The new API is temporary. It's needed to help us with porting plasma to
the layer shell protocol until Qt 6.6 is released, which includes
QWaylandShellSurface::attachPopup().
---
 src/interfaces/window.cpp | 18 ++++++++++++++++++
 src/interfaces/window.h   |  8 ++++++++
 2 files changed, 26 insertions(+)

diff --git a/src/interfaces/window.cpp b/src/interfaces/window.cpp
index 541bd59..af42cfd 100644
--- a/src/interfaces/window.cpp
+++ b/src/interfaces/window.cpp
@@ -6,6 +6,9 @@
 
 #include "window.h"
 #include "../qwaylandlayershellintegration_p.h"
+#if QT_VERSION < QT_VERSION_CHECK(6, 6, 0)
+#include "../qwaylandlayersurface_p.h"
+#endif
 
 #include <layershellqt_logging.h>
 
@@ -121,6 +124,21 @@ void Window::setDesiredOutput(QScreen *output)
     d->desiredOutput = output;
 }
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 6, 0)
+void Window::attachPopup(QWindow *window, xdg_popup *popup)
+{
+    auto waylandWindow = dynamic_cast<QtWaylandClient::QWaylandWindow *>(window->handle());
+    if (!waylandWindow) {
+        return;
+    }
+
+    auto shellSurface = dynamic_cast<QWaylandLayerSurface *>(waylandWindow->shellSurface());
+    if (shellSurface) {
+        shellSurface->get_popup(popup);
+    }
+}
+#endif
+
 Window::Window(QWindow *window)
     : QObject(window)
     , d(new WindowPrivate(window))
diff --git a/src/interfaces/window.h b/src/interfaces/window.h
index 5ebc9b1..72e3b8c 100644
--- a/src/interfaces/window.h
+++ b/src/interfaces/window.h
@@ -14,6 +14,10 @@
 
 #include "layershellqt_export.h"
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 6, 0)
+struct xdg_popup;
+#endif
+
 namespace LayerShellQt
 {
 class WindowPrivate;
@@ -93,6 +97,10 @@ public:
      */
     static Window *get(QWindow *window);
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 6, 0)
+    static void attachPopup(QWindow *window, xdg_popup *popup);
+#endif
+
 Q_SIGNALS:
     void anchorsChanged();
     void exclusionZoneChanged();